How is the BASDAI score calculated from the six questions?

The score is the mean of the first five questions (fatigue, neck/back/hip pain, joint pain/swelling, tenderness discomfort, and morning stiffness intensity), each scored 0–10, divided by 5, then added to the morning stiffness duration score (0–10 scale) and divided by 2 to produce the final BASDAI index from 0 to 10.

What do BASDAI score ranges mean for ankylosing spondylitis?

A BASDAI score above 4 generally indicates high disease activity, while a score at or below 4 suggests lower activity; however, interpretation should always be discussed with a rheumatologist who considers the full clinical picture.

Can I use this calculator on a mobile device?

Yes, the BASDAI Score Calculator on spondylitis.org is accessible via web browser on mobile devices, with the same question layout and submit function as on desktop.

Do I need to create an account to use the BASDAI calculator?

No, the tool is free to use on the public website without requiring registration or a paid subscription.

Medical & ClinicalTool Review

BASDAI Score Calculator

Provided bySpondylitis Association of Americaspondylitis.org

This page provides a dedicated BASDAI Score Calculator for ankylosing spondylitis with the standard 6 BASDAI question...

One of 6 options for BASDAI Score Calculator

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About this tool

What BASDAI Score Calculator does

The BASDAI Score Calculator on Spondylitis Association of America helps people with ankylosing spondylitis measure disease activity using the standard six-question index. Users rate fatigue, neck/back/hip pain, joint pain/swelling, tenderness discomfort, and morning stiffness intensity and duration on 0–10 scales. The tool automatically computes the standardized BASDAI score and provides interpretation guidance and formula details. Unlike some calculators that only output a number, this site includes clinical context and references for interpreting the result. The interface is straightforward, with clear label options and a single submit action to reveal the total score, and age, gender, and state fields are optional but present on the page.

Step by step

How to use the Spondylitis Association of America BASDAI Score Calculator

1
Select a number from 0 to 10 for overall fatigue level
2
Select a number from 0 to 10 for neck, back, or hip pain level
3
Select a number from 0 to 10 for joint pain/swelling level other than neck/back/hips
4
Select a number from 0 to 10 for discomfort from tender areas
5
Select a number from 0 to 10 for morning stiffness intensity and choose the duration from the listed time intervals

Is it right for you

Best for

This option suits patients or caregivers tracking ankylosing spondylitis disease activity who want a free, clinically contextualized score without needing a paid subscription or account.

Limitations

Results rely on patient self-reporting and are not a clinical diagnosis
Optional fields for age, gender, and state do not affect the BASDAI calculation
The tool measures current symptom burden over the past week only and does not replace professional medical assessment

Questions

BASDAI Score Calculator FAQ

How is the BASDAI score calculated from the six questions?: The score is the mean of the first five questions (fatigue, neck/back/hip pain, joint pain/swelling, tenderness discomfort, and morning stiffness intensity), each scored 0–10, divided by 5, then added to the morning stiffness duration score (0–10 scale) and divided by 2 to produce the final BASDAI index from 0 to 10.
What do BASDAI score ranges mean for ankylosing spondylitis?: A BASDAI score above 4 generally indicates high disease activity, while a score at or below 4 suggests lower activity; however, interpretation should always be discussed with a rheumatologist who considers the full clinical picture.
Can I use this calculator on a mobile device?: Yes, the BASDAI Score Calculator on spondylitis.org is accessible via web browser on mobile devices, with the same question layout and submit function as on desktop.
Do I need to create an account to use the BASDAI calculator?: No, the tool is free to use on the public website without requiring registration or a paid subscription.

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